crinkled leaves and black spots on oncidium and a vuylstekerara

[sperpich]

Hi,
I have a oncidium and a vuylstekerara. They both have leaves that are coming out crinkled. They also have tiny black spots. I can't find anything that fits these issues. I attached a couple pictures.

[Clawhammer]

The crinkled leaves are because your humidity is too low.

The spots do not look concerning to me

[Roberta]

I agree with Clawhammer that the black spots are nothing to worry about. To expand on the wrinkled-leaves issue, you may not be able to do much about your humidity, but you can compensate by providing more moisture to the plant.

Both of these (and the rest of the Oncidium group) like to be on the damp side - the bark looks quite large, and may not be holding enough water with your watering schedule. (That looks like a good medium for a Cattleya, but for the Oncidium group, smaller bark helps hold the necessary moisture. )

[Fran20]

Also, try adding more sphagnum moss to your bark mix to retain moisture.

[Dollythehun]

As free w Roberta and Fran20. Water more, add moss or synthic to smaller bark or go all moss. Water, water, water. All that tribe have crappy leaves, don't sweat that.

[neophyte]

definitely water more and/or make the medium more water-retentive; low water levels in the plant leads to pleating in the leaves. as Dollythehun said, these particular plants are particularly prone to spotting. the general consensus is to avoid getting water on the leaves because these ones are just a bit more susceptible to minor fungal infections that cause the spots (but it remains localized and doesn't spread, so don't worry).

[sperpich]

Thanks a ton! I'll make those changes.